GID - the Generic Image Decoder

The Generic Image Decoder (GID) is a low-level Ada package for
decoding a broad variety of image formats, from any data stream,
to any kind of medium, be it an in-memory bitmap, a GUI object,
some other stream, arrays of floating-point initial data
for scientific calculations, a Web browser element, a device,...

Full description in: doc/gid.txt

License

GID is free, open-source and released under the MIT license.